// Learn cc.Class:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/class.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/class.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html
//  - [English] https://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

const A = 100;
const B = 300;
cc.Class({
    extends: cc.Component,

    properties: {
        sp_my:cc.Sprite,
    },

    // LIFE-CYCLE CALLBACKS:

    onLoad () {
        this.rad = 0;
    },


    update (dt) {
        this.rad += dt;
        let rad = this.rad;
        let x = Math.sin(rad) * B;
        let y = Math.cos(rad) * A;
        this.sp_my.node.setPosition(x,y);
    },

    back_btnClicked(){
        cc.director.loadScene('entry/mainScene');
    },
});
